Word Study
tupperware party
CIDE DICTIONARY
tupperware party, n.
a social gathering at which the host (or more typically hostess) entertains the guests, and provides them with an opportunity to order Tupperware. This was used as an effective sales strategy by the Tupperware manufacturer, and provided income to the host(ess) from commissions on sales. [PJC]
For further exploring for "tupperware party" in Webster Dictionary Online